cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

hugepage.h (2027B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
      4 */
      5
      6
      7#ifndef _ASM_ARC_HUGEPAGE_H
      8#define _ASM_ARC_HUGEPAGE_H
      9
     10#include <linux/types.h>
     11#include <asm-generic/pgtable-nopmd.h>
     12
     13static inline pte_t pmd_pte(pmd_t pmd)
     14{
     15	return __pte(pmd_val(pmd));
     16}
     17
     18static inline pmd_t pte_pmd(pte_t pte)
     19{
     20	return __pmd(pte_val(pte));
     21}
     22
     23#define pmd_wrprotect(pmd)	pte_pmd(pte_wrprotect(pmd_pte(pmd)))
     24#define pmd_mkwrite(pmd)	pte_pmd(pte_mkwrite(pmd_pte(pmd)))
     25#define pmd_mkdirty(pmd)	pte_pmd(pte_mkdirty(pmd_pte(pmd)))
     26#define pmd_mkold(pmd)		pte_pmd(pte_mkold(pmd_pte(pmd)))
     27#define pmd_mkyoung(pmd)	pte_pmd(pte_mkyoung(pmd_pte(pmd)))
     28#define pmd_mkhuge(pmd)		pte_pmd(pte_mkhuge(pmd_pte(pmd)))
     29#define pmd_mkinvalid(pmd)	pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
     30#define pmd_mkclean(pmd)	pte_pmd(pte_mkclean(pmd_pte(pmd)))
     31
     32#define pmd_write(pmd)		pte_write(pmd_pte(pmd))
     33#define pmd_young(pmd)		pte_young(pmd_pte(pmd))
     34#define pmd_dirty(pmd)		pte_dirty(pmd_pte(pmd))
     35
     36#define mk_pmd(page, prot)	pte_pmd(mk_pte(page, prot))
     37
     38#define pmd_trans_huge(pmd)	(pmd_val(pmd) & _PAGE_HW_SZ)
     39
     40#define pfn_pmd(pfn, prot)	(__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
     41
     42static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
     43{
     44        /*
     45         * open-coded pte_modify() with additional retaining of HW_SZ bit
     46         * so that pmd_trans_huge() remains true for this PMD
     47         */
     48        return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
     49}
     50
     51static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
     52			      pmd_t *pmdp, pmd_t pmd)
     53{
     54	*pmdp = pmd;
     55}
     56
     57extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
     58				 pmd_t *pmd);
     59
     60#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
     61extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
     62				unsigned long end);
     63
     64/* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
     65#define pmdp_establish generic_pmdp_establish
     66
     67#endif